stream: set connection monitor delay. (#1120)

* stream: set connection monitor delay.

- this fixes a bug where the connection monitor delay config value does not
get set to the websocket on intialization.

* multi: add connection monitor delay to exchange config.

- this adds the connection monitor delay config option to the exchange type.
- the validate function of the exchange type has been updated to validate the
connection monitor delay value as well.

* multi: resolve review issues.

config/config.go

@@ -1821,5 +1821,10 @@ func (c *Exchange) Validate() error {
 	if c == nil {
 		return errExchangeConfigIsNil
 	}
+
+	if c.ConnectionMonitorDelay <= 0 {
+		c.ConnectionMonitorDelay = DefaultConnectionMonitorDelay
+	}
+
 	return nil
 }

config/config_types.go

@@ -30,6 +30,7 @@ const (
 	defaultWebsocketResponseMaxLimit     = time.Second * 7
 	defaultWebsocketOrderbookBufferLimit = 5
 	defaultWebsocketTrafficTimeout       = time.Second * 30
+	DefaultConnectionMonitorDelay        = time.Second * 2
 	maxAuthFailures                      = 3
 	defaultNTPAllowedDifference          = 50000000
 	defaultNTPAllowedNegativeDifference  = 50000000
@@ -149,6 +150,7 @@ type Exchange struct {
 	WebsocketResponseCheckTimeout time.Duration          `json:"websocketResponseCheckTimeout"`
 	WebsocketResponseMaxLimit     time.Duration          `json:"websocketResponseMaxLimit"`
 	WebsocketTrafficTimeout       time.Duration          `json:"websocketTrafficTimeout"`
+	ConnectionMonitorDelay        time.Duration          `json:"connectionMonitorDelay"`
 	ProxyAddress                  string                 `json:"proxyAddress,omitempty"`
 	BaseCurrencies                currency.Currencies    `json:"baseCurrencies"`
 	CurrencyPairs                 *currency.PairsManager `json:"currencyPairs"`